Spraying mechanism



Dec. 30, 1941. w. H. CARRICO SPRAYING MECHANISM Filed Dec. 5, 1939 2 Sheets-Sheet 2 S 7 H N M a B INVENT OR. W/LLMM h. flai /'00 M, WM

ATTORNEY 3.

Patented Dec. 30, 1941 SPRAYING MECHANISM William H. cameo, Detroit, Mich. Application December 5, 1939, Serial No. 307,656

6 Claims. (Cl. 299-97) This invention relates to improvements in spraying mechanism. It is illustrated as embodied in a. portable spraying deviceof the type commonly used as a garden or flower spray. Obviously the invention might be embodied in sprayingmechanism adapted for other uses.

An object is to provide spraying mechanism of simple and inexpensive construction which includes a tank adapted to carry a spraying liquid and pump mechanism associated with the tank and operable to withdraw spraying liquid therefrom and to discharge it as a spray where desired, and which pump mechanism is so constructed that the liquid contents of the tank is' maintained constantly agitated during operation of the spray pump. 0

A further object is to accomplish such agitation and mixing of the spray liquid within the tank as to maintain it thoroughly mixed at all times by directing a spray of liquid under pressure from the pump outwardly over the floor of the tank sweeping therefrom any solid particles tending to settle thereupon and causing said solid particles to remain in suspension throughout the liquid within the tank. This also permits use of spraying materials which, because of the difliculty of maintaining a uniform suspension with ordinary equipment, are not susceptible to application by spraying except through use of this invention.

tank at intervals in response to pump action. I During movement of the pump piston in one di:

1 rection these agitating streams are forced outwardly over the floor of the tank. When the piston moves in the opposite direction liquid is 'drawn into the pump. This stop and go method of agitation is particularly eflicacious in maintaining uniform distribution of the suspended particles within the liquid and in preventing settlement thereof to the floorof the tank.

Other objects, advantages, and meritorious features of the invention will more fully appear from the'following description, appended claims, and accompanying drawings, wherein:

Figure 1 is a perspective of a spraying outfit embodying my invention,

Fig. 2 is a vertical sectional view through the tank and through pump mechanism embodying my invention,

Fig. 3 is a sectional view through a tank and pump mechanism exhibiting a second modification of my invention, and

Fig. 4 is an enlarged sectional view through a part of the structure of'Fig. 3-

The construction is such that streams of agitating liquid shoot out over the floor of the tank in all directions during the operation of the pump and keep the mixture thoroughly agitated. Pump mechanism which differ in detail may be employed to accomplish this result and each embody the invention here shown.

Two difierent modifications are illustrated in the drawings. In the primary modification the lower portion of the pump chamber constitutes the compartment within which pressure is imposed upon the liquid for spraying and the upper Spraying fluids which are used for garden and flower sprays and even for other purposes frequently comprise ingredients which should be maintained in suspension in the liquid vehicle and tend to settle out. A source of diificulty is the maintaining of these particles uniformly distributed throughout the liquid so that the liquid will be uniformly eflective. Various types of stirring devices have been provided ior this purpose.

I propose to maintain the contents of the tank in agitated condition by setting up a reciprocating movement of liquid over the wall or floor of the tank. This liquid movement sweeps in one direction in the tank" and then reverses itself and sweeps in the opposite direction. I prefer to accomplish this movement of liquid by a spray of the liquid content of the tank outwardly away from the intake of the pump in all directions on one stroke of the pump and on the next pump stroke cause the movement of liquid toward the pump intake. These features are exhibited in the structures shown and hereinafter described.

In Fig. 1 a tank indicated by the numeral I0 is adapted to carry the liquid spray material. It is apparent that the tank may be of any particular shape and size. The one here shown is shaped to fit the body of an operator who would carry the same by straps 12 extending over the shoulders of the operator. The size and shape of the tank and the way in which it is carried have nothing to do with the invention.

In the construction shown in the first two iigures the tank III is shown as having a floor l2 provided with a sump I4. Pump mechanism is provided. It is here shown as embodying a pump chamber l6 threaded or otherwise secured to a reinforcing plate in the top of the tank. This pump chamber depends into the tank over the sump and has an intake l8 located within the sump. This intake is controlled by a valve 20. A foraminated element 22 superposes the valve to hold it in position. There is a pump piston 24 .provided with cups 26 and with a handle 23 adapted to be grasped by the operator to reciprocate the piston. The upper end of the pump chamber is sealed by a cap 30 which forms a water tight seal. A gasket 32 may be provided as the upper portion of this pump chamber also constitutes a depression chamber.

Leading off from the lower end of the pump chamber is a discharge line 34 which delivers liquid to a compression chamber 36 through an intake controlled by the ball check valve 38 held to its seat by spring 39. There is a spray discharge line 40 which leads from a low point in the compression chamber and is fitted with any suitable type of nozzle such as 42 in Fig. 1 and with sufi'icient flexible hose to permit of direction of the spray as desired. In order to develop presagain is indicated by the numeral ID. The main pump chamber is indicated by the numeral l6.

It communicates with the tank through an intake line H. The intake proper indicated by the numeral ll is controlled by the ball check 20 held to its seat by a spring 2|. The piston indicated at 23 is hollow. The handle is mounted adjacent to the end of the piston and there is a spray head 21 mounted on the extreme end thereof. Liquid is taken into the piston through. an intake 29 which intake is controlled by a ball check 3| held to its seat by spring 33. When the pump piston is reciprocated on its outstroke liquid isdrawn into the pump chamher. On the in-stroke this liquid is forced under pressure into the hollow piston and therefrom through the spray head 21.

There is a second pump chamber indicated as ll. Within this pump chamber is a piston l3. Pistons 23 and H are both provided with conventional cups as shown. The pump chamber H communicates with the tank through a passageway l 5. This passageway opens into the bottom of the tank as shown in Figs. 3 and 4. The bottom of the tank may be provided with an upwardly projecting boss I5 which is outwardly threaded and which is provided with a series of sure in the compression chamber prior to use of the mechanism, the nozzle 42 may be equipped with a shut off valve as shown or other suitable means may be employed.

The pump chamber is provided at its lower end with a skirt 44 and there is an adjustable plate 46 which may be screwed on to the pump intake as shown in Fig. 2. The skirt may be serrated at its lower edge providing a plurality of discharge openings 48 and the plate 46 may be threadedly adjusted to diminish or enlarge the space between the plate and the skirt 44.

There is a by-pass 50 which leads from the upper end of the pump chamber to the space within the skirt 44. Through this by-pass liquid is delivered from the upper portion of the pump chamber to the space within the skirt 44.

In the operation of the pump, liquid is drawn into the pump chamber from the sump through the valve controlled intake I8 as the pump piston is elevated. Upon the down, stroke of the piston this liquid is forced into the compression chamber 36. Upon such down stroke a depression is created above the piston within the pump chamber and into this depression liquid is drawn from the space within the skirt 44 through the b y-pass 50. When the pump piston is again elevated it not only sucks a charge into the pump chamber through the intake l8 but it expels a charge through the by-pass 50 into the space within the skirt 44 from which space a plurality of fine sprays are directed outwardly and radially through the openings 48 to sweep over the floor of the tank. These openings are at approximately the level of the floor so that whatever suspended particles tend to settle upon the floor are swept up again into the liquid within the tank whereby that constant agitation of the spray liquid is maintained. This agitation is on a stop and go cycle so that it is particularly eflicacious in maintaining the particles in suspension.

In the construction of Fig. 3 another type of spray pump is provided. This is conventional so far as the main pump chamber is concerned and the disposition of the spray line with respect thereto. In this construction the tank small openings I8 through its wall. A cap l9a is adjustably threaded upon this boss so as to control the extent of the passageways through said openings IS. The piston I3 in the secondary pump chamber H is coupled up through a link l3a with the handle 25 of piston 23 and inoperation liquid is drawn through the passageway l5 from the tank into the secondary pump chamber ll upon the withdrawal stroke of the piston and upon the compression stroke it is forced back under pressure through the passageway l5 into the tank to discharge over the floor thereof through the openings I9 in the boss l5.

What I claim:

1. In spray mechanism; a liquid containingtank having a floor sump; a pump having a pump chamber provided at its lower end with an intake positioned within said sump, a pump piston within the chamber, a compression chamber communicating with the lower end of the pump chamber. to receive liquid therefrom, a spray line leading from the compression chamber, a by-pass having one end communicating with the upper end of the pump chamber, and having its opposite end terminating on a chamber encircling the pump chamber intake and at approximately the level of the tank fioor and provided with restricted liquid .passageways adjacent the floor level through which liquid is drawn from the tank through the by-pass into the pump chamber above the piston upon its down stroke and through which liquid is discharged from the pump chamber through the by-Dass into the tank upon the up stroke of the piston.

2. In spray -mechanism; a liquid containing tank having a floor; a pump chamber provided with a valve controlled intake adjacent to the floor; a pump piston within the chamber, a compression chamber communicating through a valve controlled intake with the lower end of the pump chamber to receive liquid therefrom and provided with a spray discharge line, a skirt depending from the pump chamber surrounding the intake thereto, a by-pass communicating with the upper end of the pump chamber and communicating with the space within the skirt below the pump chamber, and means cooperating with the skirt and adjustable to provide a controlled discharge for liquid urged through the by-pass into said space to flow outwardly radially therefrom away from the pump intake and substantially upon a level with the tank floor.

3. In spray mechanism, a liquid containing tank having a floor; a pump having a pump chamber provided with an intake positioned within the tank adjacent to the floor, a pump piston within the chamber, a compression chamber communicating with the lower end of the pump chamber below the piston to receive liquid therefrom, a spray discharge line leading from the compression chamber, a by-pass having one end communicating with the upper end of the pump chamber above said piston and having its opposed end terminating at approximately the level of the tank floor and provided with restricted liquid passageways adjacent the floor level through which liquid is drawn from the tank through the by-pass into the pump chamber above the piston upon its down stroke and through which liquid is discharged from the pump chamber through the by-pass into the tank upon the up stroke of the piston.

4. In spray mechanism, a liquid containing tank having a floor, a pump mechanism including a pump plunger and a pump chamber provided with an intake at its lower end Within the tank adjacent to the floor and having a spray discharge line leading from such lower end below the plunger, said pump chamber having a second discharge line leading from its upper end above the plunger to a point at approximately the floor level to direct an agitating spray over the floor of the tank and adapted to receive therethroughliquid from the tank into the upper end of the pump chamber.

53in spraying mechanism, a liquid containing tank? having a floor, pump mechanism including a pump chamber having an intake within the tank at approximately the floor level, a liquid discharge line leading from the pump chamber, said pump mechanism including a secondary pump chamber communicating with the interior of the tank through a liquid passageway at approximately the floor level to draw liquid thereinto from the floor of the tank and adapted to discharge said liquid outwardly through said passageway over the floor of the tank, saidpump mechanism including plunger means operable to draw liquid from the tank into said two pump chambers and to exhaust the first pump chamber through its discharge line and to exhaust the secondary pump chamber through said passageway directing an agitating spray over the floor of the tank.

6. In spray mechanism, a liquid containing tankhaving a floor, pump mechanism comprising two pump chambers and including plunger mechanism reciprocable within said chambers, each pump chamber having an intake communicating with the interior of the tank adjacent to the floor to receive liquid therefrom, one pump chamber having a liquid discharge outlet leading to the outside of the tank, the other pump chamber adapted to discharge its contents through its intake as an agitating spray over the floor of the tank, said plunger mechanism reciprocable within the pump chambers to draw liquid from the interior of the tank into each chamber and to exhaust the liquid independently from said pump chambers.

WILLIAM H. CARRICO. 

